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1/*
2 HIDP implementation for Linux Bluetooth stack (BlueZ).
3 Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License version 2 as
7 published by the Free Software Foundation;
8
9 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
10 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
11 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
12 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
13 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17
18 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
19 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
20 SOFTWARE IS DISCLAIMED.
21*/
22
23#include <linux/export.h>
24#include <linux/file.h>
25
26#include "hidp.h"
27
28static struct bt_sock_list hidp_sk_list = {
29 .lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock)
30};
31
32static int hidp_sock_release(struct socket *sock)
33{
34 struct sock *sk = sock->sk;
35
36 BT_DBG("sock %p sk %p", sock, sk);
37
38 if (!sk)
39 return 0;
40
41 bt_sock_unlink(&hidp_sk_list, sk);
42
43 sock_orphan(sk);
44 sock_put(sk);
45
46 return 0;
47}
48
49static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
50{
51 void __user *argp = (void __user *) arg;
52 struct hidp_connadd_req ca;
53 struct hidp_conndel_req cd;
54 struct hidp_connlist_req cl;
55 struct hidp_conninfo ci;
56 struct socket *csock;
57 struct socket *isock;
58 int err;
59
60 BT_DBG("cmd %x arg %lx", cmd, arg);
61
62 switch (cmd) {
63 case HIDPCONNADD:
64 if (!capable(CAP_NET_ADMIN))
65 return -EPERM;
66
67 if (copy_from_user(&ca, argp, sizeof(ca)))
68 return -EFAULT;
69
70 csock = sockfd_lookup(ca.ctrl_sock, &err);
71 if (!csock)
72 return err;
73
74 isock = sockfd_lookup(ca.intr_sock, &err);
75 if (!isock) {
76 sockfd_put(csock);
77 return err;
78 }
79
80 err = hidp_connection_add(&ca, csock, isock);
81 if (!err && copy_to_user(argp, &ca, sizeof(ca)))
82 err = -EFAULT;
83
84 sockfd_put(csock);
85 sockfd_put(isock);
86
87 return err;
88
89 case HIDPCONNDEL:
90 if (!capable(CAP_NET_ADMIN))
91 return -EPERM;
92
93 if (copy_from_user(&cd, argp, sizeof(cd)))
94 return -EFAULT;
95
96 return hidp_connection_del(&cd);
97
98 case HIDPGETCONNLIST:
99 if (copy_from_user(&cl, argp, sizeof(cl)))
100 return -EFAULT;
101
102 if (cl.cnum <= 0)
103 return -EINVAL;
104
105 err = hidp_get_connlist(&cl);
106 if (!err && copy_to_user(argp, &cl, sizeof(cl)))
107 return -EFAULT;
108
109 return err;
110
111 case HIDPGETCONNINFO:
112 if (copy_from_user(&ci, argp, sizeof(ci)))
113 return -EFAULT;
114
115 err = hidp_get_conninfo(&ci);
116 if (!err && copy_to_user(argp, &ci, sizeof(ci)))
117 return -EFAULT;
118
119 return err;
120 }
121
122 return -EINVAL;
123}
124
125#ifdef CONFIG_COMPAT
126struct compat_hidp_connadd_req {
127 int ctrl_sock; /* Connected control socket */
128 int intr_sock; /* Connected interrupt socket */
129 __u16 parser;
130 __u16 rd_size;
131 compat_uptr_t rd_data;
132 __u8 country;
133 __u8 subclass;
134 __u16 vendor;
135 __u16 product;
136 __u16 version;
137 __u32 flags;
138 __u32 idle_to;
139 char name[128];
140};
141
142static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
143{
144 if (cmd == HIDPGETCONNLIST) {
145 struct hidp_connlist_req cl;
146 u32 uci;
147 int err;
148
149 if (get_user(cl.cnum, (u32 __user *) arg) ||
150 get_user(uci, (u32 __user *) (arg + 4)))
151 return -EFAULT;
152
153 cl.ci = compat_ptr(uci);
154
155 if (cl.cnum <= 0)
156 return -EINVAL;
157
158 err = hidp_get_connlist(&cl);
159
160 if (!err && put_user(cl.cnum, (u32 __user *) arg))
161 err = -EFAULT;
162
163 return err;
164 } else if (cmd == HIDPCONNADD) {
165 struct compat_hidp_connadd_req ca;
166 struct hidp_connadd_req __user *uca;
167
168 uca = compat_alloc_user_space(sizeof(*uca));
169
170 if (copy_from_user(&ca, (void __user *) arg, sizeof(ca)))
171 return -EFAULT;
172
173 if (put_user(ca.ctrl_sock, &uca->ctrl_sock) ||
174 put_user(ca.intr_sock, &uca->intr_sock) ||
175 put_user(ca.parser, &uca->parser) ||
176 put_user(ca.rd_size, &uca->rd_size) ||
177 put_user(compat_ptr(ca.rd_data), &uca->rd_data) ||
178 put_user(ca.country, &uca->country) ||
179 put_user(ca.subclass, &uca->subclass) ||
180 put_user(ca.vendor, &uca->vendor) ||
181 put_user(ca.product, &uca->product) ||
182 put_user(ca.version, &uca->version) ||
183 put_user(ca.flags, &uca->flags) ||
184 put_user(ca.idle_to, &uca->idle_to) ||
185 copy_to_user(&uca->name[0], &ca.name[0], 128))
186 return -EFAULT;
187
188 arg = (unsigned long) uca;
189
190 /* Fall through. We don't actually write back any _changes_
191 to the structure anyway, so there's no need to copy back
192 into the original compat version */
193 }
194
195 return hidp_sock_ioctl(sock, cmd, arg);
196}
197#endif
198
199static const struct proto_ops hidp_sock_ops = {
200 .family = PF_BLUETOOTH,
201 .owner = THIS_MODULE,
202 .release = hidp_sock_release,
203 .ioctl = hidp_sock_ioctl,
204#ifdef CONFIG_COMPAT
205 .compat_ioctl = hidp_sock_compat_ioctl,
206#endif
207 .bind = sock_no_bind,
208 .getname = sock_no_getname,
209 .sendmsg = sock_no_sendmsg,
210 .recvmsg = sock_no_recvmsg,
211 .poll = sock_no_poll,
212 .listen = sock_no_listen,
213 .shutdown = sock_no_shutdown,
214 .setsockopt = sock_no_setsockopt,
215 .getsockopt = sock_no_getsockopt,
216 .connect = sock_no_connect,
217 .socketpair = sock_no_socketpair,
218 .accept = sock_no_accept,
219 .mmap = sock_no_mmap
220};
221
222static struct proto hidp_proto = {
223 .name = "HIDP",
224 .owner = THIS_MODULE,
225 .obj_size = sizeof(struct bt_sock)
226};
227
228static int hidp_sock_create(struct net *net, struct socket *sock, int protocol,
229 int kern)
230{
231 struct sock *sk;
232
233 BT_DBG("sock %p", sock);
234
235 if (sock->type != SOCK_RAW)
236 return -ESOCKTNOSUPPORT;
237
238 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto, kern);
239 if (!sk)
240 return -ENOMEM;
241
242 sock_init_data(sock, sk);
243
244 sock->ops = &hidp_sock_ops;
245
246 sock->state = SS_UNCONNECTED;
247
248 sock_reset_flag(sk, SOCK_ZAPPED);
249
250 sk->sk_protocol = protocol;
251 sk->sk_state = BT_OPEN;
252
253 bt_sock_link(&hidp_sk_list, sk);
254
255 return 0;
256}
257
258static const struct net_proto_family hidp_sock_family_ops = {
259 .family = PF_BLUETOOTH,
260 .owner = THIS_MODULE,
261 .create = hidp_sock_create
262};
263
264int __init hidp_init_sockets(void)
265{
266 int err;
267
268 err = proto_register(&hidp_proto, 0);
269 if (err < 0)
270 return err;
271
272 err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops);
273 if (err < 0) {
274 BT_ERR("Can't register HIDP socket");
275 goto error;
276 }
277
278 err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL);
279 if (err < 0) {
280 BT_ERR("Failed to create HIDP proc file");
281 bt_sock_unregister(BTPROTO_HIDP);
282 goto error;
283 }
284
285 BT_INFO("HIDP socket layer initialized");
286
287 return 0;
288
289error:
290 proto_unregister(&hidp_proto);
291 return err;
292}
293
294void __exit hidp_cleanup_sockets(void)
295{
296 bt_procfs_cleanup(&init_net, "hidp");
297 bt_sock_unregister(BTPROTO_HIDP);
298 proto_unregister(&hidp_proto);
299}
1/*
2 HIDP implementation for Linux Bluetooth stack (BlueZ).
3 Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License version 2 as
7 published by the Free Software Foundation;
8
9 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
10 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
11 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
12 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
13 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17
18 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
19 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
20 SOFTWARE IS DISCLAIMED.
21*/
22
23#include <linux/export.h>
24#include <linux/file.h>
25
26#include "hidp.h"
27
28static struct bt_sock_list hidp_sk_list = {
29 .lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock)
30};
31
32static int hidp_sock_release(struct socket *sock)
33{
34 struct sock *sk = sock->sk;
35
36 BT_DBG("sock %p sk %p", sock, sk);
37
38 if (!sk)
39 return 0;
40
41 bt_sock_unlink(&hidp_sk_list, sk);
42
43 sock_orphan(sk);
44 sock_put(sk);
45
46 return 0;
47}
48
49static int do_hidp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp)
50{
51 struct hidp_connadd_req ca;
52 struct hidp_conndel_req cd;
53 struct hidp_connlist_req cl;
54 struct hidp_conninfo ci;
55 struct socket *csock;
56 struct socket *isock;
57 int err;
58
59 BT_DBG("cmd %x arg %p", cmd, argp);
60
61 switch (cmd) {
62 case HIDPCONNADD:
63 if (!capable(CAP_NET_ADMIN))
64 return -EPERM;
65
66 if (copy_from_user(&ca, argp, sizeof(ca)))
67 return -EFAULT;
68
69 csock = sockfd_lookup(ca.ctrl_sock, &err);
70 if (!csock)
71 return err;
72
73 isock = sockfd_lookup(ca.intr_sock, &err);
74 if (!isock) {
75 sockfd_put(csock);
76 return err;
77 }
78 ca.name[sizeof(ca.name)-1] = 0;
79
80 err = hidp_connection_add(&ca, csock, isock);
81 if (!err && copy_to_user(argp, &ca, sizeof(ca)))
82 err = -EFAULT;
83
84 sockfd_put(csock);
85 sockfd_put(isock);
86
87 return err;
88
89 case HIDPCONNDEL:
90 if (!capable(CAP_NET_ADMIN))
91 return -EPERM;
92
93 if (copy_from_user(&cd, argp, sizeof(cd)))
94 return -EFAULT;
95
96 return hidp_connection_del(&cd);
97
98 case HIDPGETCONNLIST:
99 if (copy_from_user(&cl, argp, sizeof(cl)))
100 return -EFAULT;
101
102 if (cl.cnum <= 0)
103 return -EINVAL;
104
105 err = hidp_get_connlist(&cl);
106 if (!err && copy_to_user(argp, &cl, sizeof(cl)))
107 return -EFAULT;
108
109 return err;
110
111 case HIDPGETCONNINFO:
112 if (copy_from_user(&ci, argp, sizeof(ci)))
113 return -EFAULT;
114
115 err = hidp_get_conninfo(&ci);
116 if (!err && copy_to_user(argp, &ci, sizeof(ci)))
117 return -EFAULT;
118
119 return err;
120 }
121
122 return -EINVAL;
123}
124
125static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
126{
127 return do_hidp_sock_ioctl(sock, cmd, (void __user *)arg);
128}
129
130#ifdef CONFIG_COMPAT
131struct compat_hidp_connadd_req {
132 int ctrl_sock; /* Connected control socket */
133 int intr_sock; /* Connected interrupt socket */
134 __u16 parser;
135 __u16 rd_size;
136 compat_uptr_t rd_data;
137 __u8 country;
138 __u8 subclass;
139 __u16 vendor;
140 __u16 product;
141 __u16 version;
142 __u32 flags;
143 __u32 idle_to;
144 char name[128];
145};
146
147static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
148{
149 void __user *argp = compat_ptr(arg);
150 int err;
151
152 if (cmd == HIDPGETCONNLIST) {
153 struct hidp_connlist_req cl;
154 u32 __user *p = argp;
155 u32 uci;
156
157 if (get_user(cl.cnum, p) || get_user(uci, p + 1))
158 return -EFAULT;
159
160 cl.ci = compat_ptr(uci);
161
162 if (cl.cnum <= 0)
163 return -EINVAL;
164
165 err = hidp_get_connlist(&cl);
166
167 if (!err && put_user(cl.cnum, p))
168 err = -EFAULT;
169
170 return err;
171 } else if (cmd == HIDPCONNADD) {
172 struct compat_hidp_connadd_req ca32;
173 struct hidp_connadd_req ca;
174 struct socket *csock;
175 struct socket *isock;
176
177 if (!capable(CAP_NET_ADMIN))
178 return -EPERM;
179
180 if (copy_from_user(&ca32, (void __user *) arg, sizeof(ca32)))
181 return -EFAULT;
182
183 ca.ctrl_sock = ca32.ctrl_sock;
184 ca.intr_sock = ca32.intr_sock;
185 ca.parser = ca32.parser;
186 ca.rd_size = ca32.rd_size;
187 ca.rd_data = compat_ptr(ca32.rd_data);
188 ca.country = ca32.country;
189 ca.subclass = ca32.subclass;
190 ca.vendor = ca32.vendor;
191 ca.product = ca32.product;
192 ca.version = ca32.version;
193 ca.flags = ca32.flags;
194 ca.idle_to = ca32.idle_to;
195 ca32.name[sizeof(ca32.name) - 1] = '\0';
196 memcpy(ca.name, ca32.name, 128);
197
198 csock = sockfd_lookup(ca.ctrl_sock, &err);
199 if (!csock)
200 return err;
201
202 isock = sockfd_lookup(ca.intr_sock, &err);
203 if (!isock) {
204 sockfd_put(csock);
205 return err;
206 }
207
208 err = hidp_connection_add(&ca, csock, isock);
209 if (!err && copy_to_user(argp, &ca32, sizeof(ca32)))
210 err = -EFAULT;
211
212 sockfd_put(csock);
213 sockfd_put(isock);
214
215 return err;
216 }
217
218 return hidp_sock_ioctl(sock, cmd, arg);
219}
220#endif
221
222static const struct proto_ops hidp_sock_ops = {
223 .family = PF_BLUETOOTH,
224 .owner = THIS_MODULE,
225 .release = hidp_sock_release,
226 .ioctl = hidp_sock_ioctl,
227#ifdef CONFIG_COMPAT
228 .compat_ioctl = hidp_sock_compat_ioctl,
229#endif
230 .bind = sock_no_bind,
231 .getname = sock_no_getname,
232 .sendmsg = sock_no_sendmsg,
233 .recvmsg = sock_no_recvmsg,
234 .listen = sock_no_listen,
235 .shutdown = sock_no_shutdown,
236 .connect = sock_no_connect,
237 .socketpair = sock_no_socketpair,
238 .accept = sock_no_accept,
239 .mmap = sock_no_mmap
240};
241
242static struct proto hidp_proto = {
243 .name = "HIDP",
244 .owner = THIS_MODULE,
245 .obj_size = sizeof(struct bt_sock)
246};
247
248static int hidp_sock_create(struct net *net, struct socket *sock, int protocol,
249 int kern)
250{
251 struct sock *sk;
252
253 BT_DBG("sock %p", sock);
254
255 if (sock->type != SOCK_RAW)
256 return -ESOCKTNOSUPPORT;
257
258 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto, kern);
259 if (!sk)
260 return -ENOMEM;
261
262 sock_init_data(sock, sk);
263
264 sock->ops = &hidp_sock_ops;
265
266 sock->state = SS_UNCONNECTED;
267
268 sock_reset_flag(sk, SOCK_ZAPPED);
269
270 sk->sk_protocol = protocol;
271 sk->sk_state = BT_OPEN;
272
273 bt_sock_link(&hidp_sk_list, sk);
274
275 return 0;
276}
277
278static const struct net_proto_family hidp_sock_family_ops = {
279 .family = PF_BLUETOOTH,
280 .owner = THIS_MODULE,
281 .create = hidp_sock_create
282};
283
284int __init hidp_init_sockets(void)
285{
286 int err;
287
288 err = proto_register(&hidp_proto, 0);
289 if (err < 0)
290 return err;
291
292 err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops);
293 if (err < 0) {
294 BT_ERR("Can't register HIDP socket");
295 goto error;
296 }
297
298 err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL);
299 if (err < 0) {
300 BT_ERR("Failed to create HIDP proc file");
301 bt_sock_unregister(BTPROTO_HIDP);
302 goto error;
303 }
304
305 BT_INFO("HIDP socket layer initialized");
306
307 return 0;
308
309error:
310 proto_unregister(&hidp_proto);
311 return err;
312}
313
314void __exit hidp_cleanup_sockets(void)
315{
316 bt_procfs_cleanup(&init_net, "hidp");
317 bt_sock_unregister(BTPROTO_HIDP);
318 proto_unregister(&hidp_proto);
319}